Wireless CDMA communications using time-varying signals

Author

Gupta, Charu ; Papandreou-Suppappola, Antonia

Author_Institution

Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA

Volume

1

fYear

2001

fDate

2001

Firstpage

242

Abstract

We propose to use time-varying signals in code division multiple access (CDMA) techniques for wireless communication channels. Specifically, we employ linear FM chirp signaling in a frequency hopped (FH) CDMA system with additive white Gaussian noise (AWGN). Every user is characterized not only by a unique pseudonoise (PN) sequence but also by a unique set of chirp rates. Our multirate chirp (MRC) FH-CDMA system has been motivated by the inherent resistance of chirp signals against AWGN. We demonstrate that our system is bandwidth efficient and resistant against AWGN. Simulations successfully demonstrate the increase in performance of the new method as compared to frequency shift keying (FSK) FH-CDMA

Keywords

AWGN channels; chirp modulation; code division multiple access; frequency hop communication; pseudonoise codes; AWGN channel; PN sequence; additive white Gaussian noise; bandwidth efficient; code division multiple access; frequency hopped CDMA system; linear FM chirp signaling; pseudonoise sequence; time-varying signals; wireless communication channels; AWGN; Bandwidth; Chirp; Doppler shift; Frequency conversion; Frequency modulation; Frequency shift keying; Multiaccess communication; Signal processing; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and its Applications, Sixth International, Symposium on. 2001

Conference_Location

Kuala Lumpur

Print_ISBN

0-7803-6703-0

Type

conf

DOI

10.1109/ISSPA.2001.949822

Filename

949822